Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc vien tue snippets" » "hoc vien tue snippets", "doc viet tue snippets", "doc tieng tue snippets", "doc dien tu snippets", "doc tien te snippets", "doc hien tu snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("doc vien tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc vien tue snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc vien tue snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc vien tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.